164 DESCRIPTION OF [Polygastrica. 



an eye, and enjoying a freedom of motion. The lorica 

 also is more free from the body of the creature than in 

 the Epipyxis, and from the sprouting forth of buds, which 

 do not separate from the parent ; hence a shrubby, forked, 

 and Monad-like cluster is produced. 



146. DINOBRYON sertularia. The fruticose Dinobryon. 

 Body large, invested with a lorica, slightly excised, 

 and dilated at the mouth, but constricted near the base. 

 Developing in the form of a shrub. (See group 83 and 



fig. 84.) This animalcule is not readily seen, by reason 

 of its crystalline lorica, and colourless body : by a patient 

 investigation, however, the little shrubby colony may be 

 perceived rolling along, and advancing in the field of 

 view. Within each lorica a pale yellow animalcule may 

 be noticed, in form somewhat resembling the young of 

 the Chlorogonium or Euglena viridis. This creature has 

 the power of stretching itself out in a spindle-shaped 

 manner, so as not to protrude, however, beyond the 

 mouth of the lorica, and also of contracting itself into a 

 globular form. The red visual point is observable at the 

 anterior part of the body, and a single thread-like pro- 

 boscis is thrust forth from out the shell. Cluster 83 

 represents a shrubby cluster, containing eight animalcules, 

 and the shells of three which have died. The vibrating 

 proboscides act like so many paddles in the water, and pro- 

 pel the moving mass. Found in bog-water. Length of 

 single animalcule 1-5 70th; ditto of cluster 1-1 20th. 



147. DINOBRYON (?) sociale. The social Dinobryon. 

 Body small, enveloped in a shell of a simply conical shape, 

 truncated at the mouth. Developed in the form of a 

 shrub. Found in fresh water. Length 1- 860th ; ditto of 

 cluster 1 -280th. 



